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ATTORNEYS R. O. TILGHMAN SHEET METAL MARKER Filed Feb. 12, 1952 Dec. 14, 1954 /r f m l IW, i b la! 4 United States Patent C) SHEET METAL MARKER Roger Odell Tilghman, Capitol Heights, Md.

Application February 12, 1952, Serial No. 271,105

2 Claims. (Cl. 33-158) This invention relates to a sheet metal marker.

An object of this invention is to provide a sheet metal marker embodying a pair of elongated bars disposed in confronting position with a scriber carried by one end of each bar, and a resilient locking member adapted to lock the bars in adjusted position relative to each other.

Another object of this invention is to provide a sheet metal marker formed of confronting elongated bars with each bar having a scriber on one end, and a longitudinally bent locking spring having a pair of openings through which the bars extend. The resiliency of the spring normally locks the bars in adjusted position and the bars are released by compressing the ends of the spring.

A further object of this invention is to provide an extensible sheet metal marker which is so constructed that the gars may be made out of channel material or may be soli With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawing and specification, and then more particularly pointed out in the appended claims.

In the drawing- Figure 1 is a plan view of a sheet metal marker constructed according to an embodiment of this invention,

Figure 2 is a detailed side elevation partly broken away and in section of the device,

Figure 3 is a sectional view taken on the line 3-3 of Figure 1,

Figure 4 is a fragmentary sectional view taken on the line 4 4 of Figure 2, I

Figure 5 is a fragmentary plan view partly in section of a modified form of this invention.

Referring to the drawing, the numerals and 11 designate generally a pair of elongated bars which are channelshaped in transverse section. The bars 10 and 11 are disposed with the bights 12 and 13 respectively, in confronting position, as shown in Figures 3 and 4. Bar 10 is provided at one end with an end piece 14 through which a scriber locking screw 15 is threaded. A scriber 16 is extended through the parallel sides 17 of bar 10 and is locked in adjusted position by means of the screw 15. Bar 11 is similar in construction to bar 10 and has at the end thereof opposite from scriber 16, a scriber 18 which is extended through the parallel sides 19 of bar 11. An end block or wall 20 is carried by the outer end of bar 11 and a scriber locking screw 21 is threaded through block 20.

The two bars 10 and 11 are adapted to be locked in endwise adjusted position by means of a longitudinally curved locking spring 22. The spring 22 is formed with a pair of openings 23 which are rectangular in configuration and through which the bars 10 and 11 are adapted to engage. The spring 20 has handles or ends 24 projecting from bar 11 and the intermediate bowed portion of spring 22 is disposed confronting the adjacent outer side of bar 10. When spring 22 is in normal position the bars 10 and 11 will be locked by biting engagement of the edges of the openings 23 with the outer edges of the channel sides 17 and 19.

The bars 10 and 11 can be released by compressing the ends 24 of spring 22 toward each other, whereupon bars 10 and 11 may be adjusted endwise to dispose the scribers 16 and 18 in a predetermined position, one relative to the other.

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Referring now to Figure 5, there is disclosed a slightly modified form of this invention wherein the bars 10a and 11a are formed of solid stock rather than of channel stock. In other respects, the device shown in Figure 5 will be the same as that shown in Figures 1 to 4, inclusive.

In the use of this device, the scribers 16 and 18 are adjusted relative to the bars 10 and 11 to dispose the points thereof in the desired spaced position from the lower sides of the bars 10 and 11. Bars 10 and 11 may then be adjusted endwise relative to each other to space the scribers 16 and 18 the desired distance apart by cornpressing the ends 24 of spring 22. When ends 24 of spring 22 are compressed, the bars 10 and 11 are released and may be readily adjusted endwise to space the scribers 16 and 18 the desired distance apart.

These scribers 16 and 18 are formed of hardened or tempered metal which will readily scratch or mark a metal surface without dulling the points of the scribers.

I do not mean to confine myself to the exact details of construction herein disclosed, but claim all variations falling within the purview of the appended claims.

What I claim is:

l. A sheet metal marker comprising a pair of elongated channel bars disposed with the bottom walls thereof in face abutting relation and with the parallel sides thereof oppositely disposed, a substantially semi-circular clamping spring normally biased toward at position, said spring having a pair of openings through which said bars engage, the outer edges of said openings being spaced apart a greater distance from each other than the inner edges whereby said outer edges will bite into the edges of the sides of one bar and the inner edges of said openings will bite into the edges of the sides of the other bar to thereby clamp said bars against movement, the ends of said spring proiecting beyond said openings and forming handles adapted to be pressed toward each other to effect release of said bars, an outer end wall fixed to the outer end of each bar. each bar having aligned openings through the parallel sides thereof inwardlv of said end wall, a scriber engaging through each pair of aligned openings, and a screw threaded through each end wall engaging an adjacent scriber for adjustably securing said scriber relative to a bar.

2. A sheet metal marker comprising a pair of elongated channel bars disposed with the bottom walls thereof in face abutting relation and with the parallel sides thereof oppositely disposed. a substantially semi-circular clamping spring normally biased toward iiat position, said spring having a pair of openings through which said bars engage, the outer edges of said openings being spaced apart a greater distance from each other than the inner edges whereby said outer edges will bite into the edges of the sides of one bar and the inner edges of said openings will bite into the edges of the sides of the other bar to thereby clamp said bars against movement, the ends of said spring projecting beyond said openings and forming handles adapted to be pressed toward each other to effect release of said bars, each bar having aligned openings through the parallel sides thereof inwardly of the ends of the bar, a scriber engaging through each pair of aligned openings, and means carried by the bar adiacent each said lopenings for adjustably securing said scriber relative to a ar.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 224,401 Derickson Feb. l0, 1880 1,670,509 Jung May 22, 1928 2,209,250 Manthey July 23, 1950 2,542,561 Olejniczak Feb. 20, 1951 FOREIGN PATENTS Number Country Date 109,796 Australia Feb. 22, 1940 

